Sound-reproducing apparatus.



WILLIS O. 0 ELLIS, OF NEAR GREENFIELD, OHIO.

SOUND-REPRODUGIN G APPARATUS.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed December 2a, 1903. serial; No. 468,978.

lb all whom it may concern:

Be it known that I, VVILms O. C. ELLIs,

a citizen of the United States, residin in the county of Fayettefnear Greenfiel in the county of Highland and State of Ohio, have invented new and useful Improvements in Sound-Reproducing Apparatus, of which the following is a specification.

This invention relates to a sound-reproducing apparatus of the general type disclosed in my pending application Serial N 0.

413,711, and has for one of its objects to improve and simplify the construction of devices of thiscliaracter so as to be comparatively simple and inexpensive to manufacture, reliable and efiicient in use, and

adapted for reproducing sound from a sound-record in a practical, simple and. satisfactory manner, the device being applicable for use in transmitting sound from one point to another by an ordinary telephonic receiver, or for use in connection with a wireless telephone by connecting the device with the sending apparatus of the wireless telephone system.

Another object of the invention is the provision of a. novel arrangement of pressure contacts which sets up an undulatory current by varying the resistance of the circuit in which the contacts are connected, the

pressure between the contacts being varied by a stylus operatively related to the contacts and riding on an undulatory record surface.

VVith .these objects in view and others, as will appear as thedescription proceeds, the

invention comprises the various novel features of construction and arrangement of parts which will be more fully described hereinafter and set forth with particularity in theclaims appended hereto.

In the accom anying drawing, which illustrates one embodiment of the invention, Figure 1 is a central vertical section of the device. Fig. 2 is a diagrammatic view of the circuit connections.

Similar reference characters are employed to designate corresponding parts throughout the views.

Referring to the drawing, A designates av metallic annular casing or shell on which is threaded a dustexcluding cap or cover 1.

Supported on a lug 2 of the shell are bind-.

ing posts 3 and 4., the former of which is electrically connected with the-shell while the latter is insulated therefrom by insulaphone receiver B through an induction coil or transformer I, there being a source of current such as abattery B in the primary circuit of the system.

. Arranged in the shell is a diametricallydisposed metallic strip 6 secured at its ends by screws 7 to the shell, and on this strip is a fixed contact or carbon button '7. Bearing on this button is a movable contact or carbon button 8 arranged on the free end of a leaf spring 9 disposed above the strip 6 and secured to a block of insulation 10 arranged in the casing or shell A. This spring is secured to the block by a screw 11 which serves as a means for the initial adjustment of the block under the spring being inclined so that the turning of the screw in one direction or ing the spring 9 with the binding post 1 through av wire or conductor 13.

Disposed under the member 6 1s a lever 14; fulcrumed at 15 and extending to the.

opposite side of the casing, the said lever constituting a weight for malntalmng the stvlus carrier 16 in such positlon that the stylus 17 will ride on the record 1". The

{stylus carrier is fulcrumed at 18 on the weight 14, and the end of the carrier opposite from the stylus is connected by a W1re or equivalent means l9'with the contactcarrying spring 9, the wire 'beingattached to a loop 20 on the spring and nsulated from the latter by applying insulation to the loop. The lever or weight 14 1s prevented from dropping when the reproducer is raised from the record 1 by a screw or projecting member 21 on the lever that engages a stop 22 on the shell or casing A.

In operation, themovement of the record causes the stylus to rise and fall with thethereof, I desire to have it understood that undulations inthe record. The pressure be-. tween the contacts 7 and 8 will. thus be varied so that the resistance of the circuit I will change in accordance with the variation i in the pressure between the contacts whereby I an undulatory current will be produced. t This undulatory cirrent so acts on the tele- Z phonic receiver R as to emit a sound which I is an exact reproduction of that which caused F the impressions on the record. i

From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention.appertains, and while I have described the principle of operation of the invention, together with the device which I now consider to be the best embodiment the device shown is merely illustrative, and that such changes may be made when desired as are within the scope of the claims appended hereto.

Having thus described the I claim is z 1. In a sound-reproducing appa 'atus, the combination of a supporting structure, a fixed contact, a movable contact bearing on the first, means for adjusting the pressure between the contacts, a weight, a stylus car-. rier mounted on the weight, and a connection between the stylus carrier and movable contact for varying the tension of pressure between the contacts in accordance with the movement of the said carrier.

2. In a sound-reproducing apparatus, the combination of a supporting body, a member fixed thereon, a contact on the member, a

invention, What spring contact on the spring bearing on the first-mentioned contact, means for adjusting the tension of the spring, a stylus carrier, :1 support for the stylus carrier arranged to hold the stylus against a record, and a connection between the stylus carrier and spring. 1

, stylus carrier fulcrumcd on thelever, a connection between the car 'ier and spring, and means for coi'inectii'ig the spring and said lmdy in circuit with a telephonic receiver.

4. The combination of a supporting body, a fixed member thereon, a contact carried by the member, a spring disposed at one side of the member, a contact on the spring hearing on the first-mentioned contact, means for adjusting the tension of the spring, a movable member constituting aweight disposed at the opposite side of the said fixed member from the spring,,a stylus carrier mounted on the weight member, a connection between the stylus carrier and spring, and means for preventing the weight member from dropping when the device is removed from the record.

In testimony whereof I afiix my signature in the presence of two witnesses.

WILLIS O. C. ELLIS.

Witnesses CONDE ELLIS, W. E. KNED ER. 

